PREMIUM DOWN For the best insulation, we only use high quality down with remarkable elasticity and insulation characteristics . FILL POWER Down is measured in terms of fill power, and a measurement of 550 is considered an efficient insulator. With a fill power of 680, our down is an exceptional insulator. PURITY Every down product is made with a mixture of pure down and feathers. We ensure that this product's down content is at least 90% for added softness and warmth. Premium Down Rib Jacket
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